Hi Graham,
I was able to replicate downloading the presets.
You may just need to exit Vegas and re-open it.
If that doesn't work, go to the following path (on Windows) to see if they have been downloaded:
C:ProgramDataGenartsSapphireEdgepresetsgenarts
If that still doesn't work, please contact me through our quickie support form at
http://www.genarts.com/support/form.
Cheers,
Maureen